Method fob reproducing films



y 1934. J. L. VIDAL 1,959,885

METHOD FOR REPHODUCING FILMS HAVING A GOFFERED B ASE Filed May 1, 1930 Patented May 22, 1934 METHOD FOR REPRODUCING FILMS HAVING A GOFFERED BASE Jean Leon Vidal, Paris, France, assignor to Keller- Dorian Colorfilm Corporation, New York, N. Y., a corporation of Delaware Application May 1, 1930, Serial No. 449,060

France May 2, 1929 11 Claims. 88-24) My invention relates particularly to an imcal surfaces. The recording of images with these provement in the method of reproducing films of films is accomplished with definition, exactitude, goffered base, but relates especially to the producand clarity of color. tion of films of that kind for use in producing On the other hand, according to French Patent motion pictures. No. 655,732 of the company, La Societe Francaise The Object of y nvent o s part cularly to de Cinematographie et de Photographic Films on provide a method of reproducing films of the Couleurs Keller-Dorian, it has been proven that above character, like those employed in the projection is more satisfactory with films which Keller-Dorian process, but in which the lines of are goflered crosswise which, since they do not 10 the recording and reproducing films maybe 10- lose their shape, do not give rise to dominant cated at any angle whatsoever in the two films. colors which are so undesirable.

Previously, in the Keller-Dorian process it was According to the present invention, it is possible, nd that the mic scopic lines of the embossing among other advantages, to combine the advanof the two films must be either parallel or rectages of said two types of film as it is possible to tengulerc d g t h P s nt nve t 011 accomplish recording on films embossed lengththe contrary, h d l s ay b Set at a y wise and projection with films embossed crossangle whatsoever. wise, and this can be carried out on the general After reference to French Patents Numbers principle of allowing the two types of embossing 566,432, 573,399, 605,875, of the Keller-Dorian on the recording and projection films respectively 20 Berthon & Company, and the company, La Societe to be at any desired angle. Francaise d n mat aphi t d P raphi Furthermore, it is found from the French Pat- Films en couleurs Keller-Dorian, relating to said ent No. 566,432 already referred to, and the process, the condition's'are shown which neces- French Patent No. 573,532 of the company, sarily govern the making of copies of films having Keller-Dorian Berthon & Co., that the moire a goffered base. This is.do'ne by proje with effect can be made to disappear from such films.

. the aid of a p a Objective ch s Symmet a While my invention is capable of being carried in relation 9 the diaphragm p a ed n h ee out in connection with, many different types of 111011 focal, pleneef t W Optical Da s- 5 apparatus, by way of illustration, I have shown the generators of the gofl'ering 0f the e t ellle only certain forms of apparatus for use therewith cylindricalelements must be effectively and praci the accompanying drawing, in which tically parallel. Nevertheless, under those con-g Fig. 1 is a diagrammatic view, partly in perditions amoir efiect is produced and to eliminate spective, showing a reproducing objective arsaid e f t recourse is a i the p cesses deranged according to patents above referred to scribed in either the French Patent No. 571,096 but with the path of the rays for films engraved 35 of the Keller-Dorian Berthon 8: Co., or to the with crossed lines.

patent of the Company, La'societe Francaise de Fi 2 is an levation Cinematographie et -de Photographic Films en d for reproduction of v Couleurs Keller-Dorian, filed upon the 9th day of fering.

August, 1928, for a method for making the reticu- Fi 3 is an l ti lation and the moire effect ppear in course used in connection with the present'invention of pr je tion I reproduction of films With a where the gofiering on the two films is located at gofifered base. According to those processes the right angles.

lines 0f th gofieling s b parallel- W V Fig. 4 is a similar view of a modified form diawhile it is better to take photographs upon a film phragm used with oblique goffering.

5 which is goifered lengthwise, it is, on the contrary, In the Fre ch Pat nt 64 ,1 0 of the company,

much more practical to project pictures with a La Societe Francaise de Cinematograhphie et de film which is go'flered rosswisee fi s Photographic Films en Couleurs Keller-Dorian, g fie d l t w s a better in ad as their there is set forth the best means of lighting the manufacture is accomplished by means of the copying machine for goffered. films consisting in 9 methods indicated in the French Patent No. the use of a lamp with a sufiiciently long filament 627,975 and the additional Patent 33,261, belongor in the adoption of an appropriate focal length ing to the company, La Societe Francaise do of the condenser of the lamp in order to provide cinematographic et de Photographic Films en uniform illumination to the entire diaphragm of Couleurs Keller-Dorian, and also in Patent No. the reproducing objective by placing the gofiered 55 637,97 f i r which give perfect cylindrifilm in the projection frame of the original film. no

of the usual diaphragm films with parallel gofof a special diaphragm a1 similar bands, 1', v

In this manner, the diaphragm, such as the diaphragm D will be entirely lighted by a kind of defraction of the rectilinear filament of the lamp across the network of the film. Accordingly, in the presentinvention the diaphragm illuminated as above is arranged as shown in the drawing, showing the original or recording film F goffered lengthwise, a new film or reproducing film F goifred crosswise, O 0' indicate the reproducing objective, while D indicates a diaphragm such as either of the diaphragms D or D" as shown in Figs. 3 and 4 respectively, when carrying out this invention. When using either of the diaphragms such as shown for example in Figs. 3 and 4, and for goffering of any given character, we can consider, by way of an example, three pre-determined zones of color running parallel to the direction in which the embossing extends and corresponding to any three primary colors of the filter screen which selects the colors of the photographic objective, these three primary .colors being designated, for example, R, V, and

B. This is as shown in Figs. 1 and 2. In Fig. 8 for instance, there are also shown three additionand b, which correspond in the same way with the three same primary colors of any given goffering and three others of the same primary colors, R, V and B, corresponding to a gofiering which is perpendicular to the goffering used in connection with the colors, 1', 1;,

- and b. When these two sets of bands of the three primary colors cross, it is noted that there are, for example, three parts A, B and C of the diaphragm not covered by cross hatching which belong at the same time to the two gofferings perpendicular to each other, but that each one of the spaces A, B and C belongs only to a single primary color, that is to say, where 7 1 corresponds to It '0 corresponds to V b corresponds to B Consequently, if we place in the objective 0 O a diaphragm with openings cutout of the same corresponding to the spaces A, B and C in the direction of the out which is indicated by the arrow, we shall be able to reproduce the goffered films where gofiering is arranged at right angles, and in fact, the same result can be obtained where the gofiering is located at any angle whatsoever, as for instance, the oblique angle as shown in Fig. 4.

When using such diaphragms, as for instance the diaphragm in Fig. 3 used with right angle gofiering, the moir effect disappears entirely. Furthermore, each sector opened and uniformly lined up as above explained, can be diaphragmed to a greater or lesser degree as found necessary, in order to rectify the colors in accordance withthe procedure of theFrench Patent No. 646,164 already referred to.

' 1 While I have described my invention in detail,

I wish it to be understood that many changes may be made thereto without departing from the spirit of same.

I claim:

1. The method which comprises producing a picture on a line goffered filmirom a line gofiered film, in which the goffering of one film is located at an angle to the gofiering of another. by projecting light on to the first-mentioned film from the last-mentioned film through a diaphragm adapted to transmit the light only to the portions of the gofieringof the first-mentioned film where being the like-color producing zones of the gofferings of the two films are in registry.

2. The method which comprises producing a picture on'a gofiered film from a gofiered film, in which the goffering of one film is located at an angle to the goffering of another, by ing the light onto the first-mentioned film through a diaphragm having openings corresponding to the overlapping colors of like color bands parallel to the goffering of the two films respectively.

3. The method which comprises producing a picture on a. goffered film from a gofiered film, in which the gofiering of one film is located at an angle to the goffering of another, the goifering of the last mentioned film being arranged lengthwise thereof, and thegoffering of the first mentioned film crosswise thereof, by projecting the light onto the first-mentioned film through a diaphragm having openings corresponding to the overlapping colors of like color bands parallel to the gofiering ofthe two films respectively.

4. The method which comprises producing a picture on a gofiered film from a gofiered film, in which the goffering of one film is located at an angle to the gofiering of another, the gofiering of one film being arranged obliquely to the goifering of the other film, by projecting the light onto the first mentioned film through a diaphragm having openings corresponding to the overlapping colors of like color bands parallel to the goffering of the two films respectively.

5. The method which comprises producing a picture on a line goffered film, with the absence of moir effects, from a line gofiered film, in which the goffering of one film is located at an angle to the goffering of ,another by projecting light on to the first-mentioned film from the lastmentioned film through a diaphragm adapted to transmit the light only to the portions of the guifering of the first-mentioned film where the likecolor producing zones of the gofferings of the two films are in registry.

6. The method which comprises producing a picture on a gofiered film, with the absence of moir efiects, from a gofiered film,'in which the gofiering of one film is located-at anangle to the goffering of another, byprojecting the light onto the first-mentioned film through a diaphragm having openings corresponding to the overlapping I colors of like color bands parallel to they goffer ing of the two films respectively.

'7. The method which comprises producing a picture on a gofiered film, with the absence of moir effects, from a goffered film, in which the gofiering of one film is located at an angle to the gofiering of another, the gofiering of the last mentioned film being arranged lengthwise there: of, and the gofiering of the first mentioned film cross-wise thereof, by projecting the light onto the first mentioned film through a diaphragm having openings corresponding to the overlapping colors of like color bands parallel to the gofiering of the two films respectively.

8. The method which comprises producing a picture on a goffered film, with the absence of moir efiects, from a gofiered film, in which the gofi'ering of one film is located at an angle to the goffering of another, the gofiering of one film arranged obliquely to the gofiering of the other film, by projecting the light onto the firstmentioned film through a diaphragm having openings corresponding to the overlapping colors of like color bands parallel to the gofiering of the two films respectively.

9, In the method of making prints from a linprojectearly lenticular film containing minute color component images that comprises projecting the images upon a sensitive linearly lenticular vfilm by means or an optical system consisting of two complete objectives, the improved steps of placing the films with their lenticulations of one film at an angle to those of the other and projecting images irom one film to the other through a diaphragm situated in the plane of theaerlal image and having a series of openings diagonal to both sets of lenticulations.

10. The method which comprises producing a picture on a line gofi'ered film from a line goflered film, in which the gofiering or one film is located at an angle to the gofi'ering of another, by projecting light on' to the first-mentioned film through the last-mentioned film and through a diaphragm so as to transmit the light substantially onto the portions of the gofiering of the first-mentioned film where the like-color producing zones of the goilerings oi the two films are in registry.

11. The method which comprises producing a picture on a line gofrer'ed film, with the absence or moire eflfects, from a line goflered film, in which the gofiering of one film is located at an angle to the gofiering of another, by projecting light on to the first-mentioned film through the last-mentioned film and through adlaphragm so as to transmit the light substantially only to the portions or the goflering of the first-mentioned film where the like-color producing zones of the goiferings or the two films are in regis y.

JEAN LEON VIDAL. 

